General Chemistry Answers

Calculate the number of moles of chlorine produced at equilibrium in a 10.0-L flask when

 2.0 mol of phosphorus pentachloride is heated to 150o

C. (Kc = 4.10 x 10-6)

PCl5(g) ↔ PCl3(g)+ Cl2(g)

Silver tarnishes in the presence of hydrogen sulfide (which smells like rotten eggs) and oxygen because of the following unbalanced chemical reaction

Ag + H₂S + O₂ à Ag₂S + H₂O

How many grams of silver sulfide can be formed from 1.1 g Ag reacting with 1.7 g of H₂S and 1.9 g of O₂

You want to prepare an aqueous antifreeze solution that could go down to ─30 °C. As the antifreeze you use ethylene glycol (EG) (HOCH₂CH₂OH), which has a density of 1.113 g/cm³. In order to prepare 6 L of such an antifreeze solution, how many liters of EG is needed?

(Density of water =1.00 g/cm³, K_f(water) = ─1.86 °C/m, C=12.00, O=16.00, H=1.00 g/mol)

A weak organic acid has a K_a value of 1.2x10^-6 at 25 °C.

(a) A buffer is prepared by mixing 500 mL 0.10 M of this weak acid solution with 250 mL of 0.04 M NaOH solution, which was further diluted to a volume of 1.25 L. Calculate the pH of the buffer solution.

(b) What will be the pH of this buffer solution after further addition of 250 mL of 0.02 M NaOH solution?

CH4+2O2=CO2+2H2O

HOW MANY MOLES OFOXYGEN ARE NEEDED TO REACT WITH 8.00 MOLES OF METHANE

Can nitric oxide be sterilized by heat

Determine if the following chemical reactions are oxidation-reduction reactions or not. If the chemical reaction is NOT a redox reaction, write NONREDOX; otherwise, balance it by oxidation number method and determine the oxidizing and reducing agents. Show your solution following the step-by-step process of the said method

K₂​Cr₂​O₄ + H₂O₂ ​+ HCl → KCl + CrCl₃ + O₂ + H₂​O

Note: It's potassium bichromate

Calculate the energy released/absorbed in MeV if one gram of deuteron (H-2) undergoes fusion

The tetraethyl lead, Pb(C2H5)4 in a 25.00 mL sample of gasoline was shaken with 15.00 mL of

0.02095 M I2. The reaction is Pb(C2H5)4 + I2 → Pb(C2H5)3I + C2H5I

After the reaction was complete, the unused I2 was titrated with 6.09 mL of 0.03465 M Na2S2O3.

I2 + 2Na2S2O3 → 2NaI + Na2S4O6

Calculate the weight in milligrams of Pb(C2H5)4 (323.4 g/mol) in each milliliter of the gasoline.

Calculate DG^o, DH^o, and DS^o for the alcohol dehydrogenase reaction under standard conditions